Restructuring Charges (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Jun. 30, 2012 employees	Mar. 31, 2012 employees	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Restructuring [Abstract]
Restructuring charges	$ 4,100,000	$ 20,800,000	$ 24,928,000	$ 0	$ 0
Severance costs	4,500,000	20,000,000
Number of employees associated with costs	41	168
Other restructuring costs (benefits)	(400,000)	800,000
Defined benefit plan, curtailments		$ 1,200,000